CN102951111B - A kind of passenger riding means of identification and method and automotive seat - Google Patents
A kind of passenger riding means of identification and method and automotive seat Download PDFInfo
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- CN102951111B CN102951111B CN201210407385.4A CN201210407385A CN102951111B CN 102951111 B CN102951111 B CN 102951111B CN 201210407385 A CN201210407385 A CN 201210407385A CN 102951111 B CN102951111 B CN 102951111B
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Abstract
Embodiments of the invention disclose a kind of passenger riding means of identification, comprising: detecting unit; Control unit, is electrically connected with detecting unit; Control unit comprises controller, A and D converter, sampling holding capacitor and reference voltage source; A and D converter is connected to controller; A and D converter is connected to the positive pole of sampling holding capacitor; The negative pole of sampling holding capacitor is connected to external power supply negative pole port; Detection port is connected to described detecting unit; The positive pole of sampling holding capacitor can switch being connected between the state of reference voltage source and the state being connected to detection port.In embodiments of the invention, passenger riding means of identification and method detect more accurately reliably has higher electromagnetic environment antijamming capability, have better electromagnetic compatibility, and relative cost is lower.
Description
Technical field
The present invention relates to the passenger riding identification field of automotive field, especially relate to a kind of passenger riding means of identification and method and automotive seat.
Background technology
Modern road traffic technology obtains in recent years and continues to develop rapidly, and more and more have employed main passive occupant safety resist technology in the riding security fields of vehicle.The sensor technology that the seat occupant being applied in the fields such as vehicle airbag control, safety strap locking takies identification also arises at the historic moment, and have also been obtained continuous progress along with the development of modern automobile science and technology.
This type of passenger riding takies identification sensor by the occupied situation to seat on vehicle, judges to export with the decision safety signal relevant to this seat position, and then decision such as exports alerting signal, preset air bag detonates state etc.
A kind of prior art of passenger riding identification sensor is the monitoring adopting the pliable pressure switch being positioned at seat to carry out human body existence.When human body is present on seat, buttocks pressure directly makes the pressure-sensitive switch of seat inside trigger, and then the resistive break-make resistance signal produced within the scope of certain impedance variations exports.According to this signal, associated control circuitry identify and judge seat take situation.
The another kind of prior art of passenger riding identification sensor is the frequency detecting mode adopting the exogenous oscillating circuits such as RC oscillator, it adopts high-frequency oscillation voltage to carry out the Detection electrode of driving sensor, by detecting exterior object under driving frequency to the capacitive coupling situation of Detection electrode, carry out the judgement of coupling amount through arithmetic system, and then realize the judgement that sensor exists occupant's human body.
What require due to Vehicle security system improves constantly, and passenger riding identification sensor judges except reliability except requiring to have very high system, also constantly requires that system has good stability and the ratio of performance to price simultaneously.But actual conditions are, at the passenger riding identification sensory field of current road vehicles, the sensor, due to the restriction of conventional art, also exists more such-and-such problems or shortcoming all more or less.
In the sensor of the first employing pressure switch technology above-mentioned; after vehicle uses certain hour; due to the effect that the long-term pressure-bearing of seat is jolted, wriggled, part sensing point or the loop partial failure of sensor usually can be there is, thus the situation causing systemic-function to lose efficacy.And this kind of failure of removal is reported to the police usually with the appearance of the form of associated safety system alarm, greatly causes the puzzlement of vehicle driver.In the maintenance of this type of system failure, also can produce very high expense.
Exogenous oscillator is adopted to carry out in the sensor of frequency couple detection at above-mentioned the second, owing to needing to measure the frequency shift produced due to capacitive coupling in Fixed Time Interval, therefore complete each time detect need the long period, this just has higher requirements to the dominant frequency performance of internal system treater, and because it is easy to be subject to the impact of sensing detection pole plate frequency drift over the ground, and the electromagnetic interference that the inner numerous electronic product of car body produces, make the technical costs designing this series products very high.Meanwhile, its oscillation frequency is through the radiation effect of sensing electrode plate, and also propose severe challenge to the EMC EMC Requirements of auto electric, its product is also limited by very large at the field of application of auto trade.
Summary of the invention
An object of the present invention is to provide and a kind of detects accurate failure-free passenger riding means of identification and method and automotive seat.
An object of the present invention is to provide the passenger riding means of identification and method and automotive seat that a kind of electromagnetic compatibility is good, antijamming capability is strong.
An object of the present invention is to provide the low passenger riding means of identification of a kind of cost and method and automotive seat.
Disclosed in embodiments of the invention, technical scheme comprises:
Provide a kind of passenger riding means of identification, it is characterized in that, comprising: detecting unit; Control unit, described control unit is electrically connected with described detecting unit; Described control unit comprises controller, A and D converter, sampling holding capacitor and reference voltage source; Described A and D converter is connected to described controller; Described control unit is provided with external power supply negative pole port and detection port; Wherein, described A and D converter is connected to the positive pole of described sampling holding capacitor; The negative pole of described sampling holding capacitor is connected to described external power supply negative pole port, and the positive pole of described sampling holding capacitor is also connected to described reference voltage source or described detection port; Described detection port is connected to described detecting unit; Wherein, the positive pole of described sampling holding capacitor can switch being connected between the state of described reference voltage source and the state being connected to described detection port.
Further, described detecting unit comprises detecting electrode and bucking electrode, and described detecting electrode is connected to described detection port, and described bucking electrode is connected to the negative pole of described external power supply; Insulating medium layer is provided with between described detecting electrode and described bucking electrode.
Further, the area of described bucking electrode is greater than the area of described detecting electrode.
Further, described A and D converter, described sampling holding capacitor and described reference voltage source are in the controller integrated.
Embodiments of the invention additionally provide a kind of automotive seat, it is characterized in that, comprise body support portion and passenger riding means of identification, and wherein, described passenger riding means of identification comprises: detecting unit, and described detecting unit is arranged in described body support portion; Control unit, described control unit is electrically connected with described detecting unit; Described control unit comprises controller, A and D converter, sampling holding capacitor and reference voltage source; Described A and D converter is connected to described controller; Described control unit is provided with external power supply negative pole port and detection port; Wherein, described A and D converter is connected to the positive pole of described sampling holding capacitor; The negative pole of described sampling holding capacitor is connected to described external power supply negative pole port, and the positive pole of described sampling holding capacitor is also connected to described reference voltage source or described detection port; Described detection port is connected to described detecting unit; Wherein, the positive pole of described sampling holding capacitor can switch being connected between the state of described reference voltage source and the state being connected to described detection port.
Further, described detecting unit comprises detecting electrode and bucking electrode, and described detecting electrode is connected to described detection port, and described bucking electrode is connected to the negative pole of described external power supply; Insulating medium layer is provided with between described detecting electrode and described bucking electrode.
Further, the area of described bucking electrode is greater than the area of described detecting electrode.
Embodiments of the invention additionally provide a kind of passenger riding recognition methods, it is characterized in that, comprising: provide a kind of passenger riding means of identification, and described passenger riding means of identification comprises: detecting unit; Control unit, described control unit is electrically connected with described detecting unit; Described control unit comprises controller, A and D converter, sampling holding capacitor and reference voltage source; Described A and D converter is connected to described controller; Described control unit is provided with external power supply negative pole port and detection port; Wherein, described A and D converter is connected to the positive pole of described sampling holding capacitor; The negative pole of described sampling holding capacitor is connected to described external power supply negative pole port, and the positive pole of described sampling holding capacitor is also connected to described reference voltage source or described detection port; Described detection port is connected to described detecting unit; Wherein, the positive pole of described sampling holding capacitor can switch being connected between the state of described reference voltage source and the state being connected to described detection port;
Make the positive pole of described sampling holding capacitor be connected to described reference voltage source, described sampling holding capacitor is charged;
The positive pole of described sampling holding capacitor is made to be connected to described detection port;
With described A and D converter, described sampling holding capacitor is sampled, obtain and detect voltage;
Passenger riding has been determined whether according to described detection voltage.
Further, described detecting unit comprises detecting electrode and bucking electrode, and described detecting electrode is connected to described detection port, and described bucking electrode is connected to the negative pole of described external power supply; Insulating medium layer is provided with between described detecting electrode and described bucking electrode.
Further, describedly determine whether that passenger riding comprises according to described detection voltage: more described detection voltage and the first detection threshold, when described detection voltage is greater than described first detection threshold, judged there is no passenger riding; More described detection voltage and the second detection threshold, when described detection voltage is less than described second detection threshold, be determined with passenger riding.
In embodiments of the invention, passenger riding means of identification and method detect more accurate reliable, there is higher electromagnetic environment antijamming capability, there is better electromagnetic compatibility, and relative cost is lower, effectively can reduce the problem that on current vehicle, this type of passenger riding means of identification fault is high, improve the stability of passenger riding means of identification, significantly reduce the cost of passenger riding means of identification.By the application of technology of the present invention, the occupant safety equipment of vehicle can be significantly improved, strengthen the occupant safety protectiveness of road vehicles.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the passenger riding means of identification of one embodiment of the invention;
Fig. 2 is the simplified structure schematic diagram of the passenger riding means of identification of one embodiment of the invention;
Fig. 3 is the schematic diagram of the detection voltage of one embodiment of the invention.
Detailed description of the invention
Below in conjunction with Figure of description, a kind of passenger riding means of identification of the present invention and method and automotive seat are described in detail.
As shown in Figure 1, in one embodiment of the present of invention, a kind of passenger riding means of identification 00 comprises detecting unit 20 and control unit 10, and detecting unit 20 and control unit 10 are electrically connected by wire 31.Control unit 10 is also connected to adaptor union 30 by another wire 32, the passenger riding means of identification of such embodiment of the present invention can be connected to other system in automobile, such as power supply, belt reminder warning, airbag control system or other controller or other system etc. by this adaptor union 30.
In one embodiment of the present of invention, detecting unit 20 can comprise detecting electrode 21 and bucking electrode 22, is provided with insulating medium layer between detecting electrode 21 and bucking electrode 22.Like this, detecting electrode 21, insulating medium layer and bucking electrode 22 in substance form a Detection capacitance, and wherein detecting electrode 21 is the positive pole of this Detection capacitance, and bucking electrode 22 is the negative pole of this Detection capacitance.
In embodiments of the invention, also comprise a kind of automotive seat, automotive seat can comprise body support portion, and this body support portion is taken and support human body for people (occupant).Aforesaid detecting unit 20 can be arranged in the body support portion of automotive seat, and wherein detecting electrode 21 can be positioned at the side closer to human body.Control unit 10 can be any suitable position be also arranged on automotive seat, such as be arranged in the body support portion of automotive seat or in the other parts of automotive seat, also can be other position of being set up in the car instead of be arranged on automotive seat.
In one embodiment of the present of invention, wherein the area of bucking electrode 22 can be greater than the area of detecting electrode 21, like this, better electromagnetic screening can be provided to detecting electrode 21, prevent the detecting unit 20 in this seat of body effect on the element in other direction in automobile or other seat, thus the reliability of passenger riding means of identification is provided.
As shown in Figure 2, in one embodiment of the present of invention, the control unit 10 of passenger riding means of identification 00 comprises controller 3, A and D converter 11, sampling holding capacitor 12 and reference voltage source 15, and A and D converter 11 is connected on controller 3.This control unit 10 can also comprise positive source port 16, power cathode port one 7 and detection port 18.Positive source port 16 is connected to external power supply positive pole, and power cathode port one 7 is connected to external power supply negative pole.Detection port 18 is connected to detecting unit 20.Such as, detection port 18 can be connected to the detecting electrode 21(of detecting unit 20 and the positive pole of aforesaid Detection capacitance) on, correspondingly now the bucking electrode 22(of detecting unit 20 and the negative pole of aforesaid Detection capacitance) external power supply negative pole can be connected to.
A and D converter 11 is connected to the positive pole of sampling holding capacitor 12; The negative pole of sampling holding capacitor 12 is connected to power cathode port one 7, is namely connected to the negative pole of external power supply; The positive pole of sampling holding capacitor 12 can also be connected to reference voltage source 15 or detection port 18.
In embodiments of the invention, sampling holding capacitor 12 can be connected to reference voltage source 15 or be connected to detection port 18, and can switch between these two kinds of coupled condition.That is, sampling holding capacitor 12 can be in the state being connected to reference voltage source 15, also can be in the state being connected to detection port 18, and can switch being connected between the state of reference voltage source 15 and the state being connected to detection port 18.This switching such as can be realized by shifter 14.In embodiments of the invention, this shifter 14 can be virtual device, namely by software simulating sampling holding capacitor 12 two coupled condition between switching; Also can be actual device, the switching between two coupled condition namely being realized sampling holding capacitor 12 by actual electronics package.The concrete software realizing this switching, method or electronics package can use software, method or electronics package conventional in this area, such as, use micro controller system internal port software prosthesis or semiconductor switch pipe to switch etc., are not described in detail at this.
In other embodiment of the present invention, this control unit 10 can also comprise communication port 19, this communication port 19 can carry out data communication with other system in automobile, the related data in passenger riding means of identification can be sent to other system or from other system receives data.This communication port 19 can be any wired or wireless communication port being suitable for carrying out with other system data communication.
In embodiments of the invention, preferably, aforesaid A and D converter 11, sampling holding capacitor 12 and reference voltage source 15 can be integrated in controller 3.Easy understand, in other embodiment of the present invention, A and D converter 11, sampling holding capacitor 12 also can be the individual components be separated with controller 3 with reference voltage source 15.
In embodiments of the invention, controller 3 can be any electronics package being suitable for execution control function, such as micro controller system, microprocessor, programmable logic device (PLD) etc.
Use this passenger riding means of identification to carry out passenger riding below in the casehistory embodiment of the present invention and know method for distinguishing.
When the passenger riding means of identification 00 in embodiments of the invention powers up work, the controller 3 of control unit 10 inside powers up work.First, the positive pole that controller 3 controls sampling holding capacitor is connected by shifter 14 and reference voltage source 15, and holding capacitor 12 of now sampling, under the effect of the loop of reference voltage source 15, enters charge condition, thus sampling holding capacitor 12 is charged.When after this sampling holding capacitor 12 charging complete, the positive terminal of its electric capacity can produce a magnitude of voltage substantially equal with reference voltage source 15.Because this Time Controller 3 internal simulation passage is not connected with the detecting unit 20 of outside, therefore this magnitude of voltage is by the impact of the using state of outside detecting unit 20, therefore can be sampled by controller 3 as the reference voltage level V1 detecting initial condition and remember.
Then, the shifter 14 in controller 3 is transformed into detection port 18, the positive pole of sampling holding capacitor is communicated with outside detecting unit 20, carries out the detection of the seizure condition of outside detecting unit 20.As mentioned before, this detecting unit 20 is arranged in the body support portion of automotive seat.
When vehicle interior has passenger riding on the seat, time in the body support portion being namely sitting in automotive seat, the capacitance of the Detection capacitance that the existence due to human body can cause detecting unit 20 to be formed changes.Because detecting unit 20 forms parallel relationship through the port of the A and D converter 11 of controller 3 with sampling holding capacitor 12 by detection port 18, now, internal charge can from the positive terminal (i.e. aforesaid detecting electrode 21) of the Detection capacitance of the positive terminal flow detection unit 20 of the higher sampling holding capacitor 12 of electromotive force.And then, the magnitude of voltage of the positive terminal in this sampling holding capacitor 12 can decline to some extent due to capacitance partial pressure effect, and form new occupant and have the magnitude of voltage V2 carried in situation, this Time Controller 3 gathers the voltage in sampling holding capacitor 12 by A and D converter 11, can obtain detection voltage.
The detection voltage in sampling holding capacitor 12 monitored by controller 3, determined whether passenger riding, namely determine whether automotive seat have sat down occupant according to this detection voltage.
In one embodiment of the present of invention, determine whether that passenger riding can comprise according to detection voltage:
Relatively detect voltage U
dwith the first detection threshold U
1, when detection voltage U
dbe greater than the first detection threshold U
1time, judge there is no passenger riding;
Relatively detect voltage U
dwith the second detection threshold U
2, when detection voltage U
dbe less than the second detection threshold U
2time, be determined with passenger riding.
Such as, Fig. 3 is the schematic diagram of the detection voltage of the passenger riding means of identification 00 of one embodiment of the invention, and wherein abscissa line is the change of work-hours, and the coordinate longitudinal axis reflects the aforesaid detection voltage U of passenger riding means of identification 00
dthe change of (i.e. the voltage of the positive terminal of aforesaid sampling holding capacitor 12).
In the drawings, passenger riding means of identification 00 adds the electro-detection initial stage, when on seat nobody time, i.e. the capacitance variation of the positive terminal of its Detection capacitance caused due to human body do not experienced of detecting unit 20.At this moment in section, detect voltage U
d(i.e. the voltage of the positive terminal of aforesaid sampling holding capacitor 12), as shown in curve in Fig. 3 41, is rendered as high voltage, and its magnitude of voltage can higher than the first detection threshold U preset in controller 3
1(42).
When seat there being people, namely detecting unit 20 can detect the capacitance variation of the positive terminal of its Detection capacitance caused due to human body.At this moment in section, detect voltage U
d(i.e. the voltage of the positive terminal of aforesaid sampling holding capacitor 12) reduces due to the dividing potential drop effect of the positive terminal of the Detection capacitance of detecting unit 20, exemplified by curve in Fig. 3 43,, be rendered as lower voltage, its magnitude of voltage can lower than the second detection threshold U preset in controller 3
2(44).
Therefore, in embodiments of the invention, controller 3 compares and detects voltage (i.e. the voltage of the positive terminal of aforesaid sampling holding capacitor 12) and the first detection threshold and the second detection threshold, when detection voltage is greater than the first detection threshold, judgement seat does not have passenger riding; When detecting voltage and being less than the second detection threshold, judge that seat has passenger riding.
In embodiments of the invention, the first detection threshold and the second detection threshold can set according to actual conditions.
In embodiments of the invention, the voltage signal of detecting unit 20 can also through the program anti-interference process of controller 3 and judgement.Like this can the disturbance that causes of filtering load external environment condition better, passenger riding means of identification 00 of the present invention is in more stable mode of operation.
Therefore, in embodiments of the invention, provide a kind of passenger riding means of identification, this passenger riding means of identification comprises: detecting unit; Control unit, control unit is electrically connected with detecting unit; Control unit comprises controller, A and D converter, sampling holding capacitor and reference voltage source; A and D converter is connected to controller; Control unit is provided with external power supply negative pole port and detection port;
Wherein, A and D converter is connected to the positive pole of sampling holding capacitor; The negative pole of sampling holding capacitor is connected to external power supply negative pole port, and the positive pole of sampling holding capacitor is also connected to reference voltage source or detection port; Detection port is connected to detecting unit;
Wherein, the positive pole of holding capacitor of sampling can switch being connected between the state of reference voltage source and the state being connected to detection port.
In an embodiment, detecting unit comprises detecting electrode and bucking electrode, and detecting electrode is connected to detection port, and bucking electrode is connected to the negative pole of external power supply; Insulating medium layer is provided with between detecting electrode and bucking electrode.
In an embodiment, the area of bucking electrode is greater than the area of detecting electrode, and the edge of the surrounded by edges detecting electrode of bucking electrode.
In an embodiment, A and D converter, sampling holding capacitor and reference voltage source are in the controller integrated.
Additionally provide a kind of automotive seat in embodiments of the invention, comprise body support portion and passenger riding means of identification, wherein, passenger riding means of identification comprises: detecting unit, and detecting unit is arranged in body support portion; Control unit, control unit is electrically connected with detecting unit; Control unit comprises controller, A and D converter, sampling holding capacitor and reference voltage source; A and D converter is connected to controller; Control unit is provided with external power supply negative pole port and detection port;
Wherein, A and D converter is connected to the positive pole of sampling holding capacitor; The negative pole of sampling holding capacitor is connected to external power supply negative pole port, and the positive pole of sampling holding capacitor is also connected to reference voltage source or detection port; Detection port is connected to detecting unit;
Wherein, the positive pole of holding capacitor of sampling can switch being connected between the state of reference voltage source and the state being connected to detection port.
In an embodiment, detecting unit comprises detecting electrode and bucking electrode, and detecting electrode is connected to detection port, and bucking electrode is connected to the negative pole of external power supply; Insulating medium layer is provided with between detecting electrode and bucking electrode.
In an embodiment, the area of bucking electrode is greater than the area of detecting electrode, and the edge of the surrounded by edges detecting electrode of bucking electrode.
Embodiments of the invention additionally provide a kind of passenger riding recognition methods, comprising: provide a kind of passenger riding means of identification, passenger riding means of identification comprises: detecting unit; Control unit, control unit is electrically connected with detecting unit; Control unit comprises controller, A and D converter, sampling holding capacitor and reference voltage source; A and D converter is connected to controller; Control unit is provided with external power supply negative pole port and detection port; Wherein, A and D converter is connected to the positive pole of sampling holding capacitor; The negative pole of sampling holding capacitor is connected to external power supply negative pole port, and the positive pole of sampling holding capacitor is also connected to reference voltage source or detection port; Detection port is connected to detecting unit; Wherein, the positive pole of holding capacitor of sampling can switch being connected between the state of reference voltage source and the state being connected to detection port;
Make the positive pole of sampling holding capacitor be connected to reference voltage source, sampling holding capacitor is charged;
The positive pole of sampling holding capacitor is made to be connected to detection port;
With A and D converter, sampling holding capacitor is sampled, obtain and detect voltage;
Passenger riding has been determined whether according to detection voltage.
In an embodiment, detecting unit comprises detecting electrode and bucking electrode, and detecting electrode is connected to detection port, and bucking electrode is connected to the negative pole of external power supply; Insulating medium layer is provided with between detecting electrode and bucking electrode.
In an embodiment, determine whether that passenger riding comprises according to detection voltage: compare and detect voltage and the first detection threshold, when detecting voltage and being greater than the first detection threshold, judged there is no passenger riding; Relatively detect voltage and the second detection threshold, when detecting voltage and being less than the second detection threshold, be determined with passenger riding.
In embodiments of the invention, passenger riding means of identification and method detect more accurate reliable, there is higher electromagnetic environment antijamming capability, there is better electromagnetic compatibility, and relative cost is lower, effectively can reduce the problem that on current vehicle, this type of passenger riding means of identification fault is high, improve the stability of passenger riding means of identification, significantly fall the cost of passenger riding means of identification.By the application of technology of the present invention, the occupant safety equipment of vehicle can be significantly improved, strengthen the occupant safety protectiveness of road vehicles.
Described the present invention by specific embodiment above, but the present invention is not limited to these specific embodiments.It will be understood by those skilled in the art that and can also make various amendment, equivalent replacement, change etc. to the present invention, as long as these conversion do not deviate from spirit of the present invention, all should within protection scope of the present invention.
Claims (7)
1. a passenger riding means of identification, is characterized in that, comprising:
Control unit, described control unit comprises controller, A and D converter, sampling holding capacitor and reference voltage source; Described A and D converter is connected to described controller; Described control unit is provided with external power supply negative pole port and detection port;
Detecting unit, described detecting unit comprises detecting electrode and bucking electrode, and described detecting electrode is connected to described detection port, and described bucking electrode is connected to the negative pole port of described external power supply; Insulating medium layer is provided with between described detecting electrode and described bucking electrode; Described control unit is electrically connected with described detecting unit;
Wherein, described A and D converter is connected to the positive pole of described sampling holding capacitor; The negative pole of described sampling holding capacitor is connected to described external power supply negative pole port, and the positive pole of described sampling holding capacitor is also connected to described reference voltage source or described detection port; Described detection port is connected to described detecting unit;
Wherein, the positive pole of described sampling holding capacitor can switch being connected between the state of described reference voltage source and the state being connected to described detection port.
2. device as claimed in claim 1, is characterized in that: the area of described bucking electrode is greater than the area of described detecting electrode.
3. device as claimed in claim 1, is characterized in that: described A and D converter, described sampling holding capacitor and described reference voltage source are in the controller integrated.
4. automotive seat, is characterized in that, comprise body support portion and passenger riding means of identification, and wherein, described passenger riding means of identification comprises:
Control unit, described control unit comprises controller, A and D converter, sampling holding capacitor and reference voltage source; Described A and D converter is connected to described controller; Described control unit is provided with external power supply negative pole port and detection port;
Detecting unit, described detecting unit is arranged in described body support portion, and described detecting unit comprises detecting electrode and bucking electrode, and described detecting electrode is connected to described detection port, and described bucking electrode is connected to the negative pole port of described external power supply; Insulating medium layer is provided with between described detecting electrode and described bucking electrode; Described control unit is electrically connected with described detecting unit;
Wherein, described A and D converter is connected to the positive pole of described sampling holding capacitor; The negative pole of described sampling holding capacitor is connected to described external power supply negative pole port, and the positive pole of described sampling holding capacitor is also connected to described reference voltage source or described detection port; Described detection port is connected to described detecting unit;
Wherein, the positive pole of described sampling holding capacitor can switch being connected between the state of described reference voltage source and the state being connected to described detection port.
5. automotive seat as claimed in claim 4, is characterized in that: the area of described bucking electrode is greater than the area of described detecting electrode.
6. a passenger riding recognition methods, is characterized in that, comprising:
There is provided a kind of passenger riding means of identification, described passenger riding means of identification comprises:
Control unit, described control unit comprises controller, A and D converter, sampling holding capacitor and reference voltage source; Described A and D converter is connected to described controller; Described control unit is provided with external power supply negative pole port and detection port;
Detecting unit, described detecting unit comprises detecting electrode and bucking electrode, and described detecting electrode is connected to described detection port, and described bucking electrode is connected to the negative pole port of described external power supply; Insulating medium layer is provided with between described detecting electrode and described bucking electrode; Described control unit is electrically connected with described detecting unit;
Wherein, described A and D converter is connected to the positive pole of described sampling holding capacitor; The negative pole of described sampling holding capacitor is connected to described external power supply negative pole port, and the positive pole of described sampling holding capacitor is also connected to described reference voltage source or described detection port; Described detection port is connected to described detecting unit;
Wherein, the positive pole of described sampling holding capacitor can switch being connected between the state of described reference voltage source and the state being connected to described detection port;
Make the positive pole of described sampling holding capacitor be connected to described reference voltage source, described sampling holding capacitor is charged;
The positive pole of described sampling holding capacitor is made to be connected to described detection port;
With described A and D converter, described sampling holding capacitor is sampled, obtain and detect voltage;
Passenger riding has been determined whether according to described detection voltage.
7. method as claimed in claim 6, is characterized in that: describedly determined whether that passenger riding comprises according to described detection voltage:
More described detection voltage and the first detection threshold, when described detection voltage is greater than described first detection threshold, judge do not have passenger riding;
More described detection voltage and the second detection threshold, when described detection voltage is less than described second detection threshold, be determined with passenger riding.
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| CN201210407385.4A CN102951111B (en) | 2012-10-23 | 2012-10-23 | A kind of passenger riding means of identification and method and automotive seat |
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| CN201210407385.4A CN102951111B (en) | 2012-10-23 | 2012-10-23 | A kind of passenger riding means of identification and method and automotive seat |
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| US20140316607A1 (en) * | 2013-04-18 | 2014-10-23 | Ford Global Technologeis, Llc | Occupant presence detection and identification |
| CN104063992B (en) * | 2014-06-28 | 2016-11-09 | 浙江吉利控股集团有限公司 | A kind of copilot side instrument desk surface articles detection warning device |
| US20220413596A1 (en) * | 2021-06-28 | 2022-12-29 | Sigmasense, Llc. | Vehicle sensor system |
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| CN102285351A (en) * | 2011-09-15 | 2011-12-21 | 张海涛 | Passenger riding identifying and sensing system |
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Effective date of registration: 20160407 Address after: 065000, No. 2, Furong Road, Langfang economic and Technological Development Zone, Hebei, 2 Patentee after: Hebei an Wen Beijing Great Automotive Components Company Limited Address before: 065000 No. 194, new open road, Langfang, Hebei Patentee before: Langfang City Jinseshiguang Science & Technology Development Co., Ltd. |